US 57 is the road that decides whether Eagle Pass is a border town with a bridge or a genuine inland port. It is also the clearest example in this corridor of the difference between a plan and a project.
There is a completed TxDOT study evaluating turning it into an interstate. There is no funded construction program. Both things are true, and conflating them is one of the more expensive mistakes capital makes here.
The corridor
US 57 runs from the U.S.–Mexico border crossing at Eagle Pass northeast to Interstate 35 south of San Antonio, spanning Maverick, Zavala and Frio counties and encompassing three international border crossings.
It is the direct freight route from this port of entry to the I-35 spine — which is the road that made Laredo. See the Southwest Texas trade corridor for how that comparison holds and where it breaks.
What TxDOT studied
TxDOT conducted a US 57 Corridor Interstate Feasibility Study evaluating conversion of the corridor to interstate highway standard while improving east-west connectivity, enhancing safety and promoting economic development.
The study included traffic, safety and economic analyses for existing and future conditions relating to congestion and freight mobility; cost-benefit assessment; development of short-, medium- and long-term improvement solutions; and stakeholder and public engagement, including two focus group meetings and a virtual public meeting on 13 October 2022.
The Final Report and Executive Summary were published in March 2023. The study documentation is complete and publicly available.
What a completed study is, and is not
This is the part that matters for underwriting.
A feasibility study is the earliest possible stage of a highway upgrade. It establishes whether a corridor could plausibly meet interstate standards and what it would take. It does not fund design, acquire right-of-way, or authorize construction, and it does not commit the state to anything.
The gap between a completed corridor study and constructed interstate-standard highway, on a route of this length, is routinely measured in decades. For comparison, the I-27 extension covered under Ports-to-Plains was placed in the Interstate System by ISTEA of 1991, Pub. L. 102-240 §1105(c)(38)(A)(i)(III) and §1105(e)(5)(A), and given its route number by the I-27 Numbering Act of 2023, Pub. L. 118-45, and still has no published completion horizon.
If your model assumes interstate-standard access from Eagle Pass to I-35 inside this decade, it is assuming something no public document supports.
The nearer-term project
The Texas-side project actually approaching construction is State Loop 480 North: roughly six miles of new roadway completing the northern section of the loop, with overpasses at US 57, FM 1588 and the Union Pacific line, running to US 277 north of Eagle Pass. Bids opened 7 April 2026 and the Texas Transportation Commission awarded the contract conditionally by Minute Order 117161 on 30 April 2026 (Hunter Industries, Ltd.; 817 working days). TxDOT has published no construction start date; its public project page still shows a September 2027 letting and a Spring 2028 start and is out of date.
For land siting purposes that project is far more consequential in the near term than the US 57 upgrade, because it determines where freight physically moves once the crossings are live. See Eagle Pass industrial land.
Common questions
Is US 57 becoming an interstate?
TxDOT completed an Interstate Feasibility Study of the corridor from Eagle Pass to I-35 south of San Antonio, publishing its final report in March 2023. A completed study is not a funded construction program, and no timeline for an upgrade has been published.
Where does US 57 go?
From the border crossing at Eagle Pass northeast to Interstate 35 south of San Antonio, through Maverick, Zavala and Frio counties.
What is the nearest-term highway project at Eagle Pass?
State Loop 480 North — roughly six miles completing the northern loop to US 277. It was let to contract on 7 April 2026 to Hunter Industries at $93.69 million (four-CSJ bundle), with 817 working days of contract time. Utility and railroad clearances are still outstanding, so construction has not begun.
Sources. TxDOT US 57 Corridor Interstate Feasibility Study (final report and executive summary, March 2023); TxDOT SL 480 North project record. Verified as of August 2026; project statuses change and every figure should be re-verified before it is relied upon.